STILL GOT MISFIRE AT 2K

M

Mr Overboooost

Guest
ok guys i need to pick your brains,ive stil got this bloody misfire and its driving me round the twist[:(!]
the syptoms are:
from cold in the morning below 2k its fine but as soon as i reach the magic 2k it coughs and splutters and then of i go again as soon as ive gone past it.
when the engine is warm i dont seem to notice it that much except when excelerating from low rpm.
so far i have changed the plugs,cap ,leads and rotor has anyone got any ideas to what next[?]
done the fault code test and its ok.
cheers
gary
 
O

Olly

Guest
Cylinder leakage test check for a burn't out valve. Anymore loss than 6 to 10 % investigated[:0]

 
E

Edd

Guest
Have you replaced fuel filter?
Could it be possible fuel pump fault - or have you uprated [:D]

1000 miles and still intact
 
M

Mr Overboooost

Guest
thanks guys i will try all three and see what happens then.
olly i dont like the idea of it being a burnt out valve[:(]sounds expensive to me[:0]
cheers
gary[:)]
 
E

Edd

Guest
i know when i changed fuel filter on mine it made notieable difference to pick up, but i think mine was original by look of it [xx(]

1000 miles and still intact
 
zia

zia

Active Member
best thing would be to check it on the roller with exhaust fuel ign test equipment connected otherwise it be case of trial and error.

zia

lord of the "R"
 
gtirpulsar

gtirpulsar

New Member
mmmm I try not to take any notice of anything in the morning/before water is normal/oil is at the 70C mark...
Your/my/our car is simply not up to operating temperatures before then... if its something thats gotten progressively worse then post again

Kev
My bumper was crafted by Calebs fair hands.
 
M

Mr Overboooost

Guest
i did think that aswell but i had it on the dyno down at abbey and the car was roasting then,it showed up quite bad but things always do on the dyno if you have a problem[:(]
i also notice it on tickover aswell now but its not there all the time.
i am going to change the fuel pump(sold the one i had the other day[:(])the fuel filter and lambda sensor but i doubt it will have any effect.[:(]
cheers
gary[:)]
 
T

turblio

New Member
Just remembered something,
on me cossie I had the same prob and it turned out to be an Injector
try a swop if you can
Frank

quote:Mines not white its Ivory
 
M

Mr Overboooost

Guest
what about if i just stuff some injector cleaner in or is that stuff as much use as a chocolate tea pot[:D][;)]
cheers
gary
 
M

Mr Overboooost

Guest
anymore ideas guys as i am running out of them fast[?][:(]
cheers
gary
 
gtirpulsar

gtirpulsar

New Member
I find injector cleaner does work - so did Caleb
Try the fault test (again) as soon as the misfire occurs

Kev
My bumper was crafted by Calebs fair hands.
 
M

Mr Overboooost

Guest
ok will do cheers for that i will let you know what happens
cheers
gary[:)]
 
M

Mr Overboooost

Guest
oh well the misfire has now got worse it does it through most of the rev range now when i boot it[:(]
but when i use light throttle at low boost it seems to be ok.
i am going to get the lambda sensor changed today to see what happens but i doubt that will have any effect[:(]
spose i will just have to keep changing bits over until it goes away .
i was going to change the fuel pump but it hasnt arrived yet[:(]
i am thinking that it could be the pump as on light throttle its ok but when i boot it it coughs and farts so the pump is working harder.
what do you recon guys[?][?]
coil[?][?]
dizzy[?][?]
more ideas would be appreciatiated[:D]
cheers
gary
 
J

j10gtr

Member
Have you tried the leads plugs rotor arm and dizzy. I had a missfire that happened under load and on boost and a small amount under low revs acceleration off boost. Replaced the leads dizzy and rotor and the problem went away.

Thanks
Paul
 
M

Mr Overboooost

Guest
ive done so far leads,rotor,cap,ecu and i am getting lambda replaced today so will see what happens.
next it will be dizzy ,coil plus lead and whatever else i can think of.
cheers
gary
 
Fast Guy

Fast Guy

Moderators
Staff member
Have you got the right plugs and correct gap?
Do you have an air leak anywhere?
Is your air filter blocked (long shot)
Other component, crank angle sensor, MAF, coil etc
Can you get an efi/ignition specialist to check it for you?

 
You must log in or register to reply here.
Top